NSRegularExpression iOS自带的正则表达式

来源：互联网发布：c 语言入门自学编辑：程序博客网时间：2024/06/05 00:53

以前做验证邮箱,电话号码的时候通常用第三方的正则表达式或者NSPredicate(点这里查看以前的文章),在后期,苹果推出了自己的正则表达式来提供给开发者调用,很方便,功能也强大.

具体可以查看官方文档,包括如何书写进行匹配的正则表达式例子,这里我就不多加详述了,因为本人看那一堆符号好烦.....只好直接求助于谷歌了,下面只给出几个常用的.

#define KPhoneRegex  @"\\d{3}-\\d{8}|\\d{3}-\\d{7}|\\d{4}-\\d{8}|\\d{4}-\\d{7}|1+[358]+\\d{9}|\\d{8}|\\d{7}"#define KWebRegex    @"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)"#define KWebOtherRegex @"http+:[^\\s]*"#define KEmailRegex  @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"

/**     1. 返回所有匹配结果的集合(适合,从一段字符串中提取我们想要匹配的所有数据)     *  - (NSArray *)matchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;     2. 返回正确匹配的个数(通过等于0,来验证邮箱,电话什么的,代替NSPredicate)     *  - (NSUInteger)numberOfMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;     3. 返回第一个匹配的结果。注意，匹配的结果保存在  NSTextCheckingResult 类型中     *  - (NSTextCheckingResult *)firstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;     4. 返回第一个正确匹配结果字符串的NSRange     *  - (NSRange)rangeOfFirstMatchInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range;     5. block方法     *  - (void)enumerateMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range usingBlock:(void (^)(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop))block;     */        /**     *  enum {     NSRegularExpressionCaseInsensitive             = 1 << 0,   // 不区分大小写的     NSRegularExpressionAllowCommentsAndWhitespace  = 1 << 1,   // 忽略空格和# -     NSRegularExpressionIgnoreMetacharacters        = 1 << 2,   // 整体化     NSRegularExpressionDotMatchesLineSeparators    = 1 << 3,   // 匹配任何字符，包括行分隔符     NSRegularExpressionAnchorsMatchLines           = 1 << 4,   // 允许^和$在匹配的开始和结束行     NSRegularExpressionUseUnixLineSeparators       = 1 << 5,   // (查找范围为整个的话无效)     NSRegularExpressionUseUnicodeWordBoundaries    = 1 << 6    // (查找范围为整个的话无效)     };     typedef NSUInteger NSRegularExpressionOptions;     */        // 下面2个枚举貌似都没什么意义,除了在block方法中,一般情况下,直接给0吧    /**     *  enum {     NSMatchingReportProgress         = 1 << 0,     NSMatchingReportCompletion       = 1 << 1,     NSMatchingAnchored               = 1 << 2,     NSMatchingWithTransparentBounds  = 1 << 3,     NSMatchingWithoutAnchoringBounds = 1 << 4     };     typedef NSUInteger NSMatchingOptions;     */        /** 此枚举值只在5.block方法中用到     *  enum {     NSMatchingProgress               = 1 << 0,     NSMatchingCompleted              = 1 << 1,     NSMatchingHitEnd                 = 1 << 2,     NSMatchingRequiredEnd            = 1 << 3,     NSMatchingInternalError          = 1 << 4     };     typedef NSUInteger NSMatchingFlags;     */        // 测试字符串，把里面的电话号码解析出来    NSString *urlString = @"哈哈哈哈呵呵呵s15279107723在这里啊啊啊啊s15279107716";    NSError *error = NULL;    // 根据匹配条件,创建了一个正则表达式(类方法,实例方法类似)    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:KPhoneRegex options:NSRegularExpressionCaseInsensitive error:&error];    if (regex != nil) {        // 3.....        NSTextCheckingResult *firstMatch = [regex firstMatchInString:urlString                                                             options:0                                                            range:NSMakeRange(0, [urlString length])];        if (firstMatch) {            NSRange resultRange = [firstMatch rangeAtIndex:0];            //从urlString中截取数据            NSString *result = [urlString substringWithRange:resultRange];            NSLog(@"result = %@",result);        }        // 2.....        NSUInteger number = [regex numberOfMatchesInString:urlString                                                   options:0                                                   range:NSMakeRange(0, [urlString length])];        NSLog(@"number = %ld",number);        // 5.....(坑爹的返回第一个匹配结果)        [regex enumerateMatchesInString:urlString options:0 range:NSMakeRange(0, [urlString length]) usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {            NSLog(@"---%@",NSStringFromRange([result range]));            if (flags != NSMatchingInternalError) {                NSRange firstHalfRange = [result rangeAtIndex:0];                if (firstHalfRange.length > 0) {                    NSString *resultString1 = [urlString substringWithRange:firstHalfRange];                    NSLog(@"result1 = %@",resultString1);                }            }            *stop = YES;        }];    }        // 替换掉你要匹配的字符串    NSString *reString = [regex stringByReplacingMatchesInString:urlString                                                        options:0                                                        range:NSMakeRange(0, [urlString length])                                                        withTemplate:@"(我就是替换的值)"];    NSLog(@"reString = %@",reString);    // 还有2个方法大家可以去尝试看看            // 1.    NSMutableArray *oneArray = [self _matchLinkWithStr:urlString withMatchStr:KPhoneRegex];    for (NSString *phone in oneArray) {        NSLog(@"phone = %@",phone);    }

// 1.....- (NSMutableArray *)_matchLinkWithStr:(NSString *)str withMatchStr:(NSString *)matchRegex;{    NSError *error = NULL;    NSRegularExpression *reg = [NSRegularExpression regularExpressionWithPattern:matchRegex                                                                         options:NSRegularExpressionCaseInsensitive                                                                           error:&error];    NSArray *match = [reg matchesInString:str                                  options:NSMatchingReportCompletion                                  range:NSMakeRange(0, [str length])];        NSMutableArray *rangeArr = [NSMutableArray array];    // 取得所有的NSRange对象    if(match.count != 0)    {        for (NSTextCheckingResult *matc in match)        {            NSRange range = [matc range];            NSValue *value = [NSValue valueWithRange:range];            [rangeArr addObject:value];        }    }    // 将要匹配的值取出来,存入数组当中    __block NSMutableArray *mulArr = [NSMutableArray array];    [rangeArr enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {        NSValue *value = (NSValue *)obj;        NSRange range = [value rangeValue];        [mulArr addObject:[str substringWithRange:range]];    }];    return mulArr;}

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